package com.talent.handler;

import com.talent.common.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.validation.BindException;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.sql.SQLIntegrityConstraintViolationException;

/**
 * 全局异常处理器
 */
@RestControllerAdvice
@Slf4j
public class GlobalExceptionHandler {

    /**
     * 捕获业务异常
     */
    @ExceptionHandler
    public Result<String> exceptionHandler(BaseException ex) {
        log.error("异常信息：{}", ex.getMessage());
        return Result.error(ex.getMessage());
    }

    /**
     * 处理SQL异常
     */
    @ExceptionHandler
    public Result<String> exceptionHandler(SQLIntegrityConstraintViolationException ex) {
        // Duplicate entry 'zhangsan' for key 'employee.idx_username'
        String message = ex.getMessage();
        if (message.contains("Duplicate entry")) {
            String[] split = message.split(" ");
            String username = split[2];
            String msg = username + "已存在";
            return Result.error(msg);
        } else {
            return Result.error("未知错误");
        }
    }

    /**
     * 处理参数校验异常
     */
    @ExceptionHandler
    public Result<String> exceptionHandler(MethodArgumentNotValidException ex) {
        FieldError fieldError = ex.getBindingResult().getFieldError();
        String message = fieldError.getDefaultMessage();
        return Result.error(message);
    }

    /**
     * 处理参数绑定异常
     */
    @ExceptionHandler
    public Result<String> exceptionHandler(BindException ex) {
        FieldError fieldError = ex.getBindingResult().getFieldError();
        String message = fieldError.getDefaultMessage();
        return Result.error(message);
    }

    /**
     * 捕获其他异常
     */
    @ExceptionHandler
    public Result<String> exceptionHandler(Exception ex) {
        log.error("异常信息：{}", ex.getMessage());
        return Result.error("未知错误");
    }
}
